Question about Makita 2 Bl1830 18v Battery,dc18ra Charger Lxt Fr Drill

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Makita bl1830 charges but stays on static red light

Relatively new batteries charged a handfull of times. Charger flashing green when empty, Insert battery staic red but normally changes to staic red with green when charged, but staying just static red. Seems to me that Makita tools are great until they need a PCB and then the cheap and nasty stuff comes to the surface just like my Mak DAB packed up after 18 mths, Could it be fixed or replaced? No chance

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  • Makita Master
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Chargers have been known to lie about what they are indicating. Even though you say the batteries were charged only a hanful of times, they may, in fact, have expired

Posted on Apr 03, 2013

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Posted on Jan 02, 2017

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SOURCE: I have makita bl1830 battery

Not true, my second charger works fine with the same batteries

Posted on Nov 19, 2011

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2 Answers

My dc18ra makita battery charger flashes red and green lights no matter how many bateries i try


The pcb inside the battery has a microcontroller that monitor the charges and charge cycle. When the cell falls below a certain voltage, it will instruct the charger not to charge and will show with a red-green flashing light. If the battery has been tried 3 times in succession then the pcb will brick itself from the makita charger. So first replace the bad cells. There are 2 solutions at this moment: charge with a 3rd party lithium charger like the imax b6 or replace the pcb with a working one. check out my blog on http://mkbl1830.blogspot.com/

Mar 17, 2012 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

1 Answer

Battery will not charge, charger flashes red and green


If both lights are blinking on the charger after putting the battery on to charge, the battery is no longer chargeable. Most likely it's bad cells inside the battery, the charger is reading the battery as bad and will not charge it. The only fix is to buy a new battery.

Feb 16, 2011 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

1 Answer

Red and green light flashing on 5 of my bl11830 battaries and they will not take a charge


If you put a battery on your charger and both red and green lights flash it is indicating that battery is defective. There may be a short in the battery or they just may be too old and worn out to charge anymore. If the charger is reading the battery as defective it will not charge the battery. The only fix is to buy new batteries.

Jan 20, 2011 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

4 Answers

Hi both red and green lights are flashing and it wont charge battery bl1830 lith ion


If both lights are flashing it means the battery is defective so it won't charge it. By defective it could mean the battery is just worn out or there may be a short in the battery. If the battery is under warranty you can get it replaced at a Makita Service Center, if not you have to buy a new battery.

Sep 13, 2010 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

3 Answers

MAKITA LXT BL1830 18V LITHIUM-ION 3.0AH BATTERY


If the charge count on the batteries is under 300, Makita will replace them. Makita has a known defect in this battery that causes the battery to shut down before it is dead. So as of now they are exchanging ones with low use.

If they are truly defective and makita won't replace, you have to open them, find the dead cell or blown fuse, and replace. Search youtube makita battery for a video on repairing this battery. But once the red and green lights on the charger flash, the the battery can't be charged on a Makita charger -- it's been locked. So use a third party charger.

Apr 18, 2010 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

3 Answers

When put on charge the green and red light flash


Yep, not the batteries, mine is doing the same thing but my second charger works fine with the same batteries

Jan 19, 2010 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

1 Answer

The charging light flashes alternately in green and red color, charging is not possible.


You have defective batteries. Either they are old and used and can no longer take a charge and should be replaced, or they have a problem not allowing them to be charged.

If batteries are new, seek replacements. If old, time to buy new batteries.

If this happens with several batteries, and even new ones, your charger my be faulty.

Feb 27, 2009 | Makita 2 Bl1830 18v Battery,dc18ra Charger...

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